Retaining valve
[化] 单向阀
🧩 词语组成解析
n. 保留, 保持, 维持防护\\nv. 保持( retain的现在分词 ); 拦住; 保存; 止住
valve
[vælv]
n. 阀;真空管;（管乐器的）活栓;（心脏的）瓣膜;
vt. 装阀于;以活门调节;
🗣️ 情景例句
Why were you out of work for so long?
你为何这么久没有工作？
A fool never learns.
傻瓜永远学不会。
The place consisted of a straggling unmade road which was lined on either side by small houses.
这儿有一条未经修筑的弯弯曲曲的道路，路两边排列着一些矮小的农舍。